Internal-combustion engine.



E. BUGATTI.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR. 6. 1916. 1,223,762. Patented A.p1.24,1917.

sTATEs PATENT oFFIC ETTORE BUGATTI, OF ARIS, FRANCE.

INTERNAL-COMBUSTION EN GI E.

,hacerca To all whom t may concefi: f

Be itv known that I,y E'r'ronn BGA'ITI, a

subjectof they King 'Italy, residing in' `Paris, France, have inventedcertain :new

spaced apart there is a loss of space.

The present invention consists in an improved constrlilction whichpermits the placing ofthe admissmn and exhaust valves d1- -rectlyopposite one another, that is to say in one and the same plane which .isperpendicular to the axis of the lcam shaft and, moreover, the formingof groups comprising four valves disposed symmetrically with respect totwo planes which are perpendicular the cylinder. p A v l Thev improvedconstruction consists inarranging'above the head of the. engine cylindersuperposedtappet membersor levers and each Provided with one or moreopenings to allow respectively the passage therethrough of a finger orequivalent member attached `to the. lower,tappet and of the valvespindle or spindles controlled by the upper tappets; this system ofcontrol permits theuse of separate cams for controlling the admissionand exhaust valves.

The invention will be described with rei"- -erence ,to the accompanyingdrawing in to one another a'nd pass through the axis of Figure l is a`vertical section, broken along the .line y g/ of Fig. 2, through thehead of an englne cylinder having the invention applied.

Fig. 2 is a plan of the same with a part plan of an adjacent cylinder.

From Fig. 2 is will be seen that an admission valve@ and an exhaustval-ve Z are disposed in eaclrof the planes z2-a1, g/-g/,-

Specification of Letters Patent.

-v`end on the valves a.

lever, also 1n the form of a plate has openitively the tappe dies of thevalves b and have parts that ratented'apr. 24. 1911.:

application med April e, 191s. serial No. 89,292,

an upper tappet member or lever f' hav'v the yform of a plate which'ishinged .at g an provided withfa projection m. In tappet plate, f is anopening la.; through this opening Canmore freely a projection carried bythe lower tappet j which is hinged at /t' and acts through its free Thelower tappet ingstthrough which can pa freely `the'- p1 ends of the rodsof'the valves b. VAlternat f cari-"bemrovd with dependent projectionsadapted to traverse the openings Z and act upon the ends of theAspindles of valves b. l

If the two projections m and z', whichgif desired may be furnished withrollers, be not situated in the same vertical l rate cams, that i's'tosay, cams ferent planes7 can beemployed) ling the valves.

aced in` diffor controly The operation of-this system of control is asfollows z--In turning, the shaft c acts'by. cam d on projection mcarried by the tappet f and thereby causes the lowering of valves;

), so that the exhaust ports becomeopenf;

lVhen the cam e acts in its turn on projection c' on tappet j it causesthe loweringl of this latter which by its free end bears on the end ofthe` spindlesV of valves a, the lowering of mission ports. v

The tappet members or levers mayv have any form; provided they have theopening or slots necessary for the reception of the projectionof thelower tappet and the spinsubject to the action of the cams.

Having now particularly described and ascertained the nature of my saidinvention and in what'manner the same is to be performed, I declare thatwhat I claim is: y

1. An internal combustion engine havin twin exhaust and admission Valveslocate directly opposite one another in a plane per-f pendicular to thecam shaft, and having tappcd levers controlling said valvesrespectively, the lever for one pair of valves located above the leverfor the other valves, said levers having projections, and, a' cam shafthaving cams acting on said projections respective-ly, such projection onthe lower tappet lever passing up through the plane of the upper lever.

2. An internal combustion engine having exhaust and admissionvalves'located d1- which brings about the opening of the ad- -l arerectly opposite one another in a plancperpendicular to the cani shaft7and having superposed tappet levers controlling said valves respcctivelythe upper lever having an opening through which a cani projection on thelower lever passes, and the lower lever having an opening through whichpasses a connection from the upper lever-to thc spindle of the valvecontrolled therehy, and a cani shaft having canis acting on said leversrespectively.

il. Xn internal combustion engine having twin exhaust umladmission"valves for enc-h c vlindcr placed opposite one another inplanes perpeinlicular to the cam shalt. coinhineil with tappet leversone operating the twin exhaust valves sind the other the twin BESTAVAlLABLE COF" 4admission valves.,` said levers arranged'in planes oneabove the other, the upper lever having an opening JChrough which passesa cam projection on the lower lever, and the lower lever having openingsthrough which pass connections from the upper lever to the spindles ofthe valves controlled thereby, and a rain shaft having cams acting onSaid levers respectively.

In witness whereof, I have hereunto signed my nume in the presenceyoftwo suhsrrihing witnesses.

ETTORE ,BUG ATTI.

Witnesses: 'I

Crus. I. Piinssm", HENRI CARTIER.

